Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c138147ae0a50e3…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 08:02:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0035634033886e28562eff0bcaaed19d SHA-1: 7b34e9907a8261685fc517b9621f7fbabdd91dda SHA-256: 5c138147ae0a50e35e6672f2972d01d99a0e1429421a52dbfaf479f0aaf77eb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The primary malicious link identified is https://netcdn.xyz/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lure users to potentially harmful content. The document's purpose is to deceive users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA7 24692 bytes
SHA-256: 77f6878a0c80ec7f0ae6a38190836b4d851c56024b74f82243548eb77f046e34
font_01_sfnt_off000084f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 18056 bytes
SHA-256: 2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02

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